32red is great, I too agree. they have more than 1 casino btw. 4 in total, so it's a group. 32red itself has the best bonuses though. nedplay 2nd, then dash and golden lounge, the last one doesn't even have comp points yet. But they all have decent winning chances.
Gaming club, king neptunes and the 3 others are great too, nice bonuses.
Casino rewards group have great first time bonuses, at least most of them.
but their ongoing bonuses are not so spectacular. Excellent support though.
Fortune room group is great too... all through the week freerolls, except for the weekends, and also great bonuses.
The ones who accept US players, most of them I don't like at all, very tight play.
and the rest, what slotbeuker said!
vegas regal is I think the only good, make that superb, rival casino.
and clubworld are the only good rtg group.